Non-singular inflationary universe from polymer matter

Details Non-singular inflationary universe from polymer matter Non-singular inflationary universe from polymer matter

2009-06-16

arxiv.org/abs/0906.2798v2

Phys.Rev.D81:024005,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 1 figure; v2 clarifications added, reference updated

Scientific paper

10.1103/PhysRevD.81.024005

We consider a polymer quantization of a free massless scalar field in a homogeneous and isotropic cosmological spacetime. This quantization method assumes that field translations are fundamentally discrete, and is related to but distinct from that used in loop quantum gravity. The semi-classical Friedman equation yields a universe that is non-singular and non-bouncing, without quantum gravity. The model has an early de Sitter-like inflationary phase with sufficient expansion to resolve the horizon and entropy problems, and a built in mechanism for a graceful exit from inflation.

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